Frederick, Colorado (United States of America) - "Frederick Pack Burro Race". Miners Day is our premier community event that originated as a celebration to honor and remember Frederick’s mining heritage. This annual event features family-oriented fun and entertainment throughout the day including a parade, burro race, vendors, food trucks, activities, contests, and live entertainment. Per tradition, Miners Day will conclude with a spectacular evening concert and fireworks display. Celebrate Miners Day with this great sport begun by some of Colorado’s 19th-century miners. This 9K race will begin right after the Frederick Miners Day parade (between 10:30 am & 11 am). BYOB - bring your own burro or rent one! The 9K race will start at Fifth Street and Locust Street (Downtown Frederick), head north along the trail and through the tunnel towards the Frederick Recreation Area, loop around Milavec Lake, head back south to the finish line in Centennial Park. There are some small bridges along the paved trail. www.frederickco.gov/240/Miners-Day

La Veta, Colorado (United States of America) - "Wild Wahatoya Runs". Come join us to run through a magical part of history in the Cuchara Valley. The Spanish Peaks of Southern Colorado have been among the most important landmarks of the southwestern United States, guiding Native American tribes, Spanish and French trappers, gold seekers, hunters, and American settlers. The Ute, Comanche, Apache, and other, earlier Native American tribes held the peaks in religious awe and named the mountains Wahatoya, meaning “Breasts of the Earth.” Our event will be pairing with both the town of La Veta and Cuchara to help them celebrate their annual October Fest. We will have a 50K, heavy half marathon, and 8ish mile event. The 50K will start in the town of La Veta, wrap itself through the middle of the town, onto a rugged out-of-commission county road with sweeping views of the dikes, buttes, and mountains in the surrounding areas. You will end on newly reopened and maintained trails that guide you straight into town ending with a festival at the Cuchara Yacht Club. The heavy half and 8 mile will start on private property, take on the Dike trail and some other local favorites, to end back under the arch at the Yacht Club to join the party. We will be partnering with the local brewer to provide finish line beers, and other local businesses to provide five-star accommodations, live music from local talent, and great food. All course profiles and GPX files are released on the race website! www.trailtrashadventures.com/races/event-one-gzzml

Boulder, Colorado (United States of America) - "Boulderthon: Boulder Marathon, Half Marathon, 10K, 5K". Colorado's Largest Fall Race: Run a 5k, 10k, Half, or Full, at the foothills of the Rockies, in the stunning running mecca of Boulder. Run the streets Olympians train on, then celebrate at our epic after-party downtown! Boulderthon is one of the top-rated marathons in the United States: Named top 10 in America by USA Today, #5 Best Half Marathon in the US by Active, as well as #1 Best in Colorado and #13 Most Beautiful Marathon in the World by HalfMarathons.Net, Boulderthon drew over 10,000 runners from all 50 States and 23 Countries in 2024, nearly doubling in registration, and selling out. Tucked into a picturesque valley below the iconic Flatirons, Boulder, Colorado sets the backdrop for the top-ranked, signature Boulder Marathon, Boulderthon. Boulder is a world-class destination offering 300 days of sunshine and endless recreation, shopping, dining, cultural and entertainment choices. It's no wonder National Geographic named Boulder the Happiest City in America. www.boulderthon.org

Colorado Springs, Colorado (United States of America) - "Colorado Springs Marathon, Half & 5K". Come celebrate the 12th Annual Colorado Springs Marathon on Saturday, October 4, 2025. Whether you are a seasoned runner or looking to tackle your first 5k, we have you covered with 4 events to choose from. The courses will showcase the city of Colorado Springs, taking runners past historic monuments, through beautiful parks and culminates in the heart of downtown at the Colorado Springs Pioneers Museum where the post-race celebration awaits. This family-friendly race is a premiere endurance running event, attracting people from all over the country. Secure your spot today before events sell out (race has completely sold out the past 4 years)! www.thecoloradospringsmarathon.com

Evergreen, Colorado (United States of America) - "EAPL's Zombie Fun Run 5K". Run, walk, crawl family event supporting the Evergreen Animal Protective League (EAPL). Bring your family (doggies are welcome)! We strongly encourage your spookiest, ghoulish, Halloween gear! Come out and HOWL with EAPL. https://getmeregistered.com/EAPLZombieRun5k